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Title:
Mine door structure
United States Patent 2621725
Inventors:
Anthony, Shacikoski
Application Number:
US27816052A
Publication Date:
12/16/1952
Filing Date:
03/24/1952
Assignee:
Anthony, Shacikoski
Primary Class:
Other Classes:
160/40, 160/210, 160/350, 160/368.1, 160/DIG.8, 299/12
International Classes:
E21F1/10
View Patent Images:
US Patent References:
2549850Fireplace screen hanger1951-04-24
2139779Refrigerator1938-12-13
1398909Coal-mine curtain-rod1921-11-29
0894918N/A1908-08-04